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Signal Intensity of High B-value Diffusion-weighted Imaging for the Detection of Prostate Cancer | ||
Journal of Biomedical Physics and Engineering | ||
مقاله 8، دوره 9، شماره 4، آبان 2019، صفحه 453-458 اصل مقاله (549.84 K) | ||
نوع مقاله: Original Research | ||
شناسه دیجیتال (DOI): 10.31661/jbpe.v0i0.811 | ||
نویسندگان | ||
A - Rezaeyan* 1؛ M J Tahmasebi Birgani1؛ N Chegeni1؛ M Sarkarian2؛ M Gh Hanafi3؛ Gh Akbarizadeh4 | ||
1Department of Medical Physics, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran | ||
2Department of Urology, Golestan Hospital, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran | ||
3Department of Radiology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran | ||
4Department of Electrical Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran | ||
چکیده | ||
Background: Diffusion-weighted imaging (DWI) is a main component of multiparametric MRI for prostate cancer detection. Recently, high b value DWI has gained more attention because of its capability for tumor characterization. Objective: To assess based on histopathological findings of transrectal ultrasound (TRUS)-guided prostate biopsy as a reference, an increase in signal intensity of prostatic lesions in comparison with normal background tissue on high b-value diffusion-weighted images could be a sign of malignancy. Material and Methods: Fifty-three consecutive patients retrospectively included in the study. All patients underwent routine TRUS-guided prostate biopsies involving 12 cores after the magnetic resonance imaging (MRI) examinations. In seventeen patients (n =35 lesions), the prostate cancer was histologically confirmed by TRUS-guided prostate biopsy. The biopsy results of other patients were negative. Signal intensities on the high b-value (1600 s/mm2) images of the peripheral zone, the central gland, and the defined lesions were evaluated using region of interest-based measurements. Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) for prostate cancer detection using signal intensity of high b value diffusion-weighted images were calculated. Results: In the patients with confirmed prostate cancer, fourteen had visually increased SI on the high b-value images. The SI of lesions for these patients was higher than the SI of peripheral zone (22±18%) or central gland (31±20%). In patients with a negative biopsy, eight had visually increased SI on the high b-value images. The SI of lesions for these patients was 23±21% and 35±18% higher than the SI in the peripheral zone and the central gland, respectively. The sensitivity, specificity, PPV, and NPV for prostate cancer using SI of high b value DWI were 71, 87, 62, and 87 %, respectively. Conclusion: Visually increased SI on the high b-value images can be an indication of malignancy, although some benign lesions also show this increase in signal intensity. | ||
کلیدواژهها | ||
Diffusion Magnetic Resonance Imaging؛ Prostatic Neoplasms؛ Predictive Value of Tests | ||
مراجع | ||
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